[gradsusr] NetCDF4 File Problem

[Justin Arnott - NOAA Federal]

Thank you Jennifer,

This did the trick.  Thank you!

Justin

On Mon, Nov 19, 2012 at 11:42 AM, Jennifer Adams <jma at cola.iges.org> wrote:

> Please look at the documentation
> http://iges.org/grads/gadoc/SDFdescriptorfile.html.
>
> 1. Your variable declaration should have "vars 2" instead of "vars 1"
> 2. Your alias cannot contain any upper case letters (it should be:
> intTime=>inttime)
>
> From the ncdump output, the variable Pressure has five coordinate
> dimensions:
>         float Pressure(time, ens, fhour, lat, lon) ;
>
> This is a bit strange, so try the following full descriptor file (use
> 'open' instead of 'xdfopen'):
>
> DSET ^pres_msl_latlon_all_20120101_20120101_justm8Dgdh.nc
> dtype netcdf
> TITLE This is a sample USL grid box for Central California
> UNDEF -9.99e8 _FillValue
> XDEF 63 LINEAR 233.0 1.0
> YDEF 29 LINEAR 23.0 1.0
> zdef 1 linear 1 1
> tdef 5 linear 1jan2012 3hr
> edef 11 names 0 1 2 3 4 5 6 7 8 9 10
> VARS 1
> Pressure=>prs  0  0,e,t,y,x  Pressure
> ENDVARS
>
> --Jennifer
>
>
> On Nov 19, 2012, at 11:17 AM, Justin Arnott - NOAA Federal wrote:
>
> Good Morning,
>
> I am trying to use GrADS make use of some GEFS re-forecast data that is
> available in netCDF4 format (attached is one example, which can be accessed
> from: http://esrl.noaa.gov/psd/forecasts/reforecast2/download.html).
>
> Using "sdfopen" I am successfully able to open the file.
>
> However, only one variable is listed as available in GrADS (called "*
> inttime*" see below), even though ncdump indicates there is an additional
> variable (Pressure), which is what I originally requested from the site.
>
> From GrADS:
>
> descriptor: pres_msl_latlon_all_20120101_20120101_justm8Dgdh.nc
>   Binary: pres_msl_latlon_all_20120101_20120101_justm8Dgdh.nc
>   Type = Gridded
>   Xsize = 63  Ysize = 29  Zsize = 1  Tsize = 1  Esize = 11
>   Number of Variables = 1
>      inttime  0  t  time as an integer (YYYYMMDDHH)
>
> I have tried to create a data descriptor file and use xdfopen (see
> below)...but I can't seem to get past the 'inttime' variable.  This file
> works if I remove the Pressure line, but again limits me to viewing the
> inttime variable...which is simply the date stored as an integer
> (2012010100).
>
> DSET pres_msl_latlon_all_20120301_20120301_justt-Hd8C.nc
> TITLE This is a sample USL grid box for Central California
> UNDEF -9999
> XDEF lon 63 LINEAR 233.0 1.0
> YDEF lat 29 LINEAR 23.0 1.0
> VARS 1
> intTime=>intTime 1 99 Pressure
> Pressure=>Pressure 1 99 Pressure
> ENDVARS
>
> Does anyone have suggestions on how I might go about getting to the
> pressure data?
>
> Thanks in advance,
>
> Justin
>
> --
> Justin Arnott
> Science and Operations Officer
> National Weather Service
> Gaylord, Michigan
> ---
> justin.arnott at noaa.gov
> 989-731-3384 x766
>
> <pres_msl_latlon_all_20120101_20120101_justm8Dgdh.nc>
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>
>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
>
>
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>
>


-- 
Justin Arnott
Science and Operations Officer
National Weather Service
Gaylord, Michigan
---
justin.arnott at noaa.gov
989-731-3384 x766
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